Pressure-governor for heating systems.



G. SMITH.

PRESSURE GOVERNOR FOR HEATING SYSTEMS.

, APPLICATION FILED JUNE 7, 1909.

1,01 6,372. Patented Feb. 6, 1912. h

3 SHEETS-SHEET Z.

G. SMITH.

PRESSURE GOVERNOR FOR HEATING SYSTEMS.

APPLIOATION FILED JUNE 7, 1909.

1,016,372. Patented Feb. 6,1912.

3 SHEETSSHEET 3.

w biesses. I nvenion 5a a M .parts throughout UNITED STATES PATENT FFIOE.

GRANT SMITH, 0F TORONTO, ONTARIO, CANADA PRESSURE-GOVERNOR FOR HEATING SYSTEMS Application filed June 7,

To all whom it may concern:

Be it known that 1, GRANT SMITH, of the city of Toronto, in the county of York and Province of Ontario, Canada, have invented certain new and useful Improvements in Pressure-Governors for Heating Systems; and I hereby declare that the following is a full, clear, and exact description of the same.

It has been ascertained by actual experience that the best results, in steam and hot water heating, are obtained from the rapid circulation of the heating agent; 2'. e.the number of heat units radiated to the atmosphere increase in proportion to. the increase of rapidity of circulation.

The rapidity of circulation can be effected by creating an artificial pressure on the heating agent, raising the boiling point, controlling the vaporization, and retaining the heat units in a latent condition. This is accomplished by employing a governing device to resist the expansion of the heating agent until the latter attains a predetermined maximum, the governing device then yielding, and relieving the pressure, and automatically returning again to its resisting condition.

The invention therefore relates to a governing device by which these functions can be attained and which will return theheating agent from the expansion chamber, expansion tank, or feed pipe into the heating apparatus -without permitting a vacuum to be created therein. i

For an understanding of the invention reference is to be had to the following description and to the accompanying drawings in which Figure 1, is a sectional elevation of a heating system. Fig. 2, is a vertical section of the device governing the pressure in a heating system, and Fig. 3, is a modification of the construction shown in Fig. 2.

Like characters of reference refer to like the specification and drawings.

The application of artificial pressure to the heating agent, when such artificial pressure exceeds atmospheric pressure at the sea Specification of Letters Patent.

' Patented Feb. 6, i912.

1909. Serial No. 500,545.

level, increases the degree of heat required to bring the heating agent to boiling point in the ratio of the excess of artificial pressure to atmospheric pressure. This artificial pressure results in the prevention of the vaporization of the heating agent at 212 Fahrenheit, the extra heat units becoming latent in the heating agent to be given off by radiation during the circulation of the heating agent through the heating apparatus.

The latency of the heat units increases the expansive power of the heating agent and it is necessary therefore to provide for the increased expansion so that the pressure governing device will yield and provide instant relief when the pressure exceeds a predeter mined maximum, and instantly restore the pressure when the excess is relieved. The device by which this pressure is created and relieved,may be described as comprising a mer cury chamber a, a relief pipe Z) having one end contained within the mercury chamber a and sealed by the. mercury therein, and the other end connected with an expansion chamber-d which in turn may be connected with an expansion tank e, The mercury chamber is provided with two ports and 9 above the mercury, the port being controlled by a check valve h preventing the heating agent within the mercury chamber finding an outlet through the port, but permitting the inlet, through the port f into the mercury chamber, of the water from the expansion chamber and expansion tank, or for the admission of the water from the water main. In practice I find it advisable to connect the feed pipe i to the port f and pivot the check valve it within the former so that the check valve will open to permit thecontents of the feed pipe passing into the upper part of the mercury chamber a.

The feed pipe which ma, be builtup of any number of sections has its upper end connected through a port it: with the expansion chamber d, and may be coi'mected with the expansion tank 6 by pipe 7). Between the ports 70 and f the feed pipe is provided with a T Z to which a water main m may be connected, the water main being provided with a valve 0 regulating the flow of Water to the feed pipe." The water passes through the water main m and the feed pipe i-into the mercury chamber a above the mercury c, and; filling the mercury chamber, flows th'hn igh the port 9 into the return pipe 9 of the heating system, which feeds it to the boiler r.' The water when heated, circulates through theflow pipe s to the radiators t and returns to the boiler r through the return pipe g with which the radiators are connected.

I can install my pressure regulating device on any part of the system between the expansion tank and the return header of the boiler, although K have shown it in the present drawings to be connected with the return pipe of the topmost radiator, and with the expansion tank, the bottom of which is on the same, level as the top of that radiator.

The apparatus as shown in Fig. 1, is designed for hot water-heating purposes, and in themercury chamber is placed sufficient mercury to create a predetermined pressure.

In the event of the pressure resulting from the expansion of the heating agent exceed lief pipe into the mercury chamber, and

seals the relief pipe, the heating agent returning from the expansion tank and expansion chamber, throughthe feed pipe 2' displacing the check valve 7t and passing into the mercury chamber through the port f from which it circulates to the return pipe 9 of the heating system.

Under ordinary conditions the, mercury is not apt to be forced through the expansion chamber into the expansion tank and consequently the expansion chamber need not be provided with bafiie plates, this construction being shown in Fig. 3, but to prevent the mercurybeing forced through the expansion chamber under any abnormal condition I provide the latter with inclined baflle plates to interposed between the port is and the inlet port for the relief pipe Z), the batlle plates being preferably arranged alternately on opposite sides of the expansion chamber as shown in Fig. 2. D

Having thus fully described my 1nvent1 on what I claim as new and desire to secure by Letters Patent is 1. The hereinbefore described device for governing pressure in a heating system, comprising a sealing chamber contalnlng a 'sealmg agent and having a port above the Sealing agent for connection with a circu- Iating pipe of a heating system, and a port separate from the first mentioned port for the feed of the heating agent into the sealing chamber above the sealing agent, a relief pipe, one end of which is contained in the sealing chamber and sealed by the sealing agent below the level of the ports, a separating chamber connected with the other end of the relief pipe and having a port, a bypass pipe connected with the port of the separating chamber and with the second mentioned port of the sealing chamber, and a check valve pivoted within the bypass pipe to permit of the flow of the heating agent from the by-pass pipe into the sealing chamber, and to prevent the flow of the heat ing agent and sealing agent from the sealing chamber into the by-pass pipe.

2. Thehereinbefore described device for governing pressure in a heating system comprising a sealing'chamber containing a sealingagent and having a port above the sealing agent for connection with a circulating pipe of a heating system, and a port separate from the first mentioned port for the feed of the heating agent into the sealing chamber above the sealing agent, a relief pipe, one end of which is contained in the sealing chamber and sealed by the sealing agent below the level of the ports, a separating chamber connected with the other end of the relief pipe and having a port, a by-pass pipe for connection with an expansion chamber connected with the port of the separating chamber and with the second mentioned port of the sealing chamber, a check valve pivoted within the by-pass pipe permitting of the fiow of the heating agent from the bypass pipe into the sealing chamber above the sealing agent and preventing the flow of the sealing agent and heating agent from the sealing chamber into the bypass pipe, and a connection for the by-pass p1pe adapted to communicate with the water main.

3. The hereinbefore described device for governing pressure in a heating system,

comprising a sealing chamber containing a sealing agent and having a port above the sealing agent for connection with a circulating pipe of a heating system, and a port separate from the first mentioned port for the feed of the heating agent into the sealing chamber above the sealing agent, a relief pipe, one end of which is contained in the sealing chamber and sealed by the sealing agent below the level of the ports, 'a separating chamber connected with the other end of the relief pipe andhaving a port, a

by-pass pipe for connection with an expansion chamber connected with the port of the separating chamber and with the second mentioned port of the sealing chamber, a check valve pivoted within the by-pass pipe permitting of the flow of the heating agent posed above I the other in the separating from the bypass pipe into the sealing cha nchamber.

her above the sealing agent and preventing Toronto, April 22nd, 1909.

the flow of the sealing agent and heating 7 GRANT pHHTH agent from the sealing chamber into the bypass pipe, a connection for the Toy-pass pipe In presence of adapted to communicate with the Water O. H. RIGHEs, main, and inclined battle plates one super- H. L. TRIMBLn. 

